500W Oval Shaped High Power WireWound Resistor Silicon Coating
500W Oval Shaped Silicon Coating High Power Wire Wound Resistors
Structure :
1.A flat tubular ceramic has two terminals and is wound with either copper wire or chromium alloy wire as a resistance element. It is coated with a high-temperature non-flammable resin.When cooled and dried,it is encapsulated in insulation through a high-temperature process before the final installation of the component mounts.
2.It is mainly utilized for industrial installations where height is limited.
4.Non-inductive & variable type on requests;
5.Working voltage and Nominal resistance value are related to Ohm’s law.
Features:
1.Anti-corrosion,excellent heat resistance;the resistor has small temperature coefficient and linear change.
2.It is normal that the resistor is smoking when it used in the first power.
3.Due to the excellent windings, many taps can be added, impedance is low,and PC board is insertable,and usable for many other integrated applications.
4.For custom specifications, please contact us to discuss the details.
5.Support precision resistance tolerance requirement.
Specification
| Performance Charactertics | ||
| Test | Conditions of Test | Testing Results |
| Resistance Tolerance | Testing Voltage ≤3V,Ambient Temperature 25℃ | B---D---F---G---J--K |
| Rated Load | 40℃,rated voltage,1hour | △R≤±(3％+0.1Ω) |
| Short Time Overload | 5 times rated power for 10s | △R≤±(0.2％+0.1Ω) |
| Dielectric Withstand Voltage | 2 times Rated Power Voltage +1kv AC 60s (with grounding), leakage current 2.5mA ; 2 times Rated Power Voltage +2kv AC 60s (with grounding), leakage current 2.5mA ; |
△R≤±(0.1％+0.05Ω) |
| Insulation Resistance | 500V DC | ≥10GΩ1Min |
| Terminal Tensile Strength | 40N | No off |
| Vibration resistance | 1.5mm,10-55-10Hz,each 2hours | No damage,No off |
| Load Life | at rated voltage,90 min "On",30 min "Off" ,total 500hours | △R≤±(3％+0.1Ω) |
| Low Temperature Resistance Testing | store at -65℃±3℃ for 2H | △R≤±(1%+0.1Ω) |
| High Temperature Resistance Testing | store at 70 ℃± 2 ℃ for 16h, connect the rated voltage DC circuit for 1s | △R≤±(1%+0.1Ω) |
| Non-flammability | 10 times rated power, power on for 5s | without combustion |
Applications:
Widely used in educational modeling applications,load testing,industrial machinery,electric power distribution,instruments, automation control installations,etc.
For custom specifications,please contact us to discuss the details.
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